Lighting module and optical fiber lighting device using the same

Abstract

A lighting module comprises a first light source, a second light source and a phosphor element is provided. The first light source emits a first exciting light. The second light source emits a second exciting light. The phosphor element converts the first exciting light and the second exciting light to an emission light. The first exciting light and the second exciting light are input to the phosphor element in different directions of incidence.

What is claimed is:  
     
       1. A lighting module, comprising:
 a first light source for emitting a first exciting light; 
 a second light source for emitting a second exciting light; and 
 a phosphor element for converting the first exciting light and the second exciting light to an emission light, 
 wherein the first exciting light and the second exciting light are input to the phosphor element in different directions of incidence; 
 wherein the phosphor element has a bottom surface and a top surface opposite to the bottom surface; 
 wherein the first exciting light is input to the phosphor element through the bottom surface, and the second exciting light is input to the phosphor element through the top surface. 
 
     
     
       2. The lighting module according to  claim 1 , further comprising:
 a reflecting mask for reflecting the second exciting light to the top surface of the phosphor element. 
 
     
     
       3. The lighting module according to  claim 1 , further comprising:
 a light guide plate for guiding the second exciting light to the top surface of the phosphor element. 
 
     
     
       4. The lighting module according to  claim 1 , further comprising:
 an optical fiber for receiving the first exciting light, the second exciting light and the emission light, wherein the optical fiber is disposed above the top surface of the phosphor element. 
 
     
     
       5. The lighting module according to  claim 4 , wherein a cross section area of the optical fiber is substantial equal to the area of the phosphor element. 
     
     
       6. The lighting module according to  claim 4 , further comprising:
 a lens for guiding the second exciting light to the top surface of the phosphor element and the emission light to the optical fiber. 
 
     
     
       7. The lighting module according to  claim 1 , wherein a divergent angle of the first light source is larger than that of the second light source. 
     
     
       8. The lighting module according to  claim 7 , wherein the first light source is a plurality of LEDs, the second light source is at least one LD, and the bottom surface of the phosphor element is attached to the LEDs. 
     
     
       9. The lighting module according to  claim 8 , wherein a beam pattern of the second exciting light is corresponding to a pitch between the LEDs. 
     
     
       10. The lighting module according to  claim 8 , wherein the second light source comprises a plurality of LDs, and beam patterns of different LDs are overlapped to each other. 
     
     
       11. The lighting module according to  claim 1 , wherein a beam pattern of the first exciting light is different from that of the second exciting light. 
     
     
       12. The lighting module according to  claim 11 , wherein a phosphors thickness in the phosphor element is not evenly distributed, the beam pattern of the first exciting light is evenly distributed over the whole phosphor element, and the beam pattern of the second exciting light is distributed over a portion of the phosphor element having higher phosphors thickness. 
     
     
       13. The lighting module according to  claim 11 , wherein the beam pattern of the second exciting light overlaps that of the first exciting light. 
     
     
       14. An optical fiber lighting device, comprising:
 a first light source for emitting a first exciting light; 
 a second light source for emitting a second exciting light; 
 a phosphor element for converting the first exciting light and the second exciting light to an emission light, wherein the first exciting light and the second exciting light are input to the phosphor element in different directions of incidence; 
 an optical fiber for receiving the first exciting light, the second exciting light and the emission light, and the optical fiber is disposed above the phosphor element; and 
 a mixing chamber for mixing and guiding the first exciting light, the second exciting light and the emission light, and the mixing chamber is disposed between the optical fiber and the phosphor element. 
 
     
     
       15. A lighting module, comprising:
 a first light source for emitting a first exciting light; 
 a second light source for emitting a second exciting light; and 
 a phosphor element for converting the first exciting light and the second exciting light to an emission light, 
 wherein the first exciting light and the second exciting light are input to the phosphor element in different directions of incidence, 
 wherein the phosphor element has a bottom surface and a lateral surface adjoining the bottom surface, and 
 wherein the first exciting light is input to the phosphor element through the bottom surface, and the second exciting light is input to the phosphor element through the lateral surface.